Slag-pocket for furnaces.



E. H. HOLZWORTH.

SLAG POCKET FOR FURNACES.

APPLICATION man MAR.16, me.

1,200,839; Patented oat. 10,1916.

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ERNEST H. HoLzwonTH, or LowELLviLrE, oHIo.

SLAG-POCKET FOR, FURNACES.

Specification of Letters Patent.

Patented Oct. 10, 1916.

Application filed March 16, 1916. Serial No. 84,618.

To all 'whom t may concern Be itlrnown that I, ERNEST H. I-IoLzwoR'rH, a citizen of the United States,` residing at Lowellville, in the county of Mahoning and State of Ohio, have invented newr and useful Improvements in Slag-Pockets for Furnaces, of which the following is a specification. j

My invention relates to slag-pockets for metallurgical furnaces and more particularly for pockets'of the open hearth regenerative type. y

In the usual operation of an open hearth furnace for manufacturing steel, the filling of the slag-pockets with slag necessitates the occasional stopping of the operation of the furnace for cleaning out the pocket. This cleaning of the slag-pockets is destructive of the brickwork of which they are made, and causes a large expense for rebuilding the pockets anda large loss in the output of the furnace.

It is one' of the objects of this invention to divide each slag pocket into sections or Subpockets, so that the slag therein may be in relatively small masses which may be removed by a crane without Waiting for the mass of slag to get cold.

Another object; is to line the ,slag-pocket with false relatively fragile walls which will break up when the craneis applied to lift the slag, and thereby prevent the dest-rnction of the expensive fixed walls which surround the pocket and supPGlb the superstructure at the end of the furnace.

'A still further object is te provide craneengagng devices which project into or across the subpockets when empty so that when the subpcckets have been filled with slag, the latter may as Soon' solidified be quickly removed.

Further objects will appear hereinafter.

Referring to the accompanying drawing, Figure. l is. avertcal section showing two Slagreclrets and the adjacent portions a furnace; Fig- 2, a horizontal Section. the line ll-IL Figt l; and. Fig- 39a plan view, partly broken away, 'showing one of the crane-engaging devicea On the drawing, l and 2 show two Parallel adjacent slag-pocket s,'but' as the. een struction of bothslag-pockets is the Same, l will describe but one, that marked l! This pocket has the usual vSide and' endy Walls 3. On the bottom ci the pocket 'I pnt ture 4 of dolomite and Weedy on'wliich I; con- Struct a series of subpockets 5, each having the bottom 6, side walls 7, and the end walls 8 .made of refractory brick or other Suitable material. The opposing or inner faces of the walls 7 are preferably vertical and parallel, while their outer faces preferably diverge downwardly without engaging with the side walls 3. The adjacent ends of the successive subpockets are spaced apart a Short distance, and the end wall 8 of the rearmost Subpocket is also spaced a short distance from the adjacent wall 3. The said spaces between the side walls 7 and the walls 3, between the end walls of successive subpockets, and between the end wall of the rear suhpoclet and the wall 3, are filled with the said` mixture 4 of dolomite and wood. The said mixture 4 extends up preferably slightly above the top of the walls 7, the upper surface thereof having a brick covering 9 inclined toward the subpocket, so that any slag falling thereon will iow into the subpocket. It is thus seen that the subpookets may be regarded as being separated by partitions composed of a pair of walls 8 Separated by a illerof the mixture 4.

Each of the Subpockets has one end provided with at least one crane-engaging device l0 which I have shown in the form of an elongated metal link interlinked with a similar linkor a crane-engaging device 11 extending transversely through each subpocket and having its ends extending into the mixture 4. These crane-engaging devices 10 and 11 may be arranged at any suitable level'in the subpockets so that the slag which collects therein may rise above their level. I have shown these devices at about half the distance between the top and the bottom of the subpockets. The outer end of each device 10 is supported in the partition between the ends of adjacent subpockets, excepbthat the device l0 of the outermost subpocket 5 extends through the wall 8 merely, which ordinarily will not be accompanied with the mixture 4 of dolomite and wood. This device 11, as well as that marked 10, may be provided with a coating 12 of fireclay, ganister, or other refractory material which will cling to the iron, steel or other material ofk which the devices 10 and 11 may be composed.

In Figs. 1 and 2 I have shown one subpocket, filled with a mass 13 of slag in which are embedded those portions o1' the craneengaging devices 110. and ll which. are

the pocket. When the subpockets haverbe* come filled with slag to the top of the sub pockets or well above the devices 10 and 11 a crane-hook is connected to the eye of the device l0 which projects outside of the end wall 8. Owing to the heat from the slag stance. When the crane pulls up on th device 1.0 the entire mass of slag 1n the endout of its place, the charcoal and dolomite readily breaking up. Also during the opwill be more or less broken up and removed.

ai tween the ends of successive subpockets.

In a slag-pocket, fixed side walls, a

and the hot gases passing over the pockets,

the' wood in the mixture 4l: will be converted into charcoal which is a very brittle subsubpockets so as to be nciosed by the slag,

and a readily displaceable filler between the side walls and the subpocliets and also beplurality of subpockets arranged end to end between the side walls, crane-engaging devices having portions arranged within the subpockets so as to be inclosed by the slag,

and a readily displaceable filler between the r side walls and the subpockets, the said filler most subnocket 5 should be readil lifted containing a carbonaceous material converti- 5 ble into charcoal ny the heat of the furnace Y gases and the slag.

4. In a slag-pocket, fixed side walls, a

plurality of subpockets arranged end to end After the slag from the first subpocket has between the side walls, crane-engaging debeen removed, the crane-hook will be con-vices having portions arranged within the nected to the device 10 of the next subpocket subpockets so as to be inclosed by the slag, n and a readily displaceable filler between the l, side walls and the snbpockets, the said filler cleared away. In case it is found impossible and the operation continued until all th slag in the severa-l subpockets has been ll, whereupon crane-hooks may be connect-l1 ed to the eyes of the said device 11 and the; n

said subpocket loosened. The slag may theni be removed b v the continued application of the crane to the device 11 or the crane may be disconnected from the said device and again connected to the device l0.

The mixture el is composed of dolomite or other refractory substance broken into small pieces intermingled with s'pieces of wood which may be in any form, such as blocks or long strips or poles. It is not essential that this mixture shall be made of any particular material so long as it shall become or remain in a relatively fragile condition, whereby it may be broken up by the lifting action of the crane or by a tool employed in gaining access to the ends of the said device l1 as above described.

I donot limit myself to the precise form of crane-engaging devices shown or to any definite number of them. It may not be necessary to use both the devices 10 and 11 but I prefer to use both of them, or at least that the devices l0 shall be interlinled with a cross-piece preferably such as shown by the devices ll so that there will be no danger of the devices 10 pulling out of the slag.

I claim- 1.. In a slag-pocket, fixed side walls, a plurality of subpockets arranged end to end between the side walls, crane-engaging devices having portions arranged within the subpockets so as to be inclosed by the slag, l

containing a mixture of refractory bodies and a carbonaceous material convertible into charcoal.

5. In a slag-pocket, fixed side walls, a plurality of subpockets arranged end to end between the side walls, crane-engaging de- ,vices having portions arranged within the subpockets so as to be mclosed by the slag,

and a readily displaceable filler between the side `walls and the subpockets, and also beneath the subpockets. K

6. A plurality of slag-pockets arranged end to end, and metallic devices having portions Within the path of the slag as it fills the pockets and crane-engaging portions out of the path of the slag.

7. A1 plurality ofv slag-pockets arranged end to end, metallic devices having portions within the path of the slag as it fills the pockets and crane-engaging portions out of the path of the slag, and refractory material on the portion of the said devices within the pockets.

8. A plurality of slag-pockets arranged end to end, metallic devices having portions within the path of the slag as it fills the pockets and crane-engaging portions out of the path of the slag, refractory material on the portion of the said devices within the pockets, the metallic device of one end pocket being accessible', and the metallic devices of the remaining pockets becoming accessible as the slag-pockets with the contained slag are successively removed.

9. A plurality of slag-pockets arranged end to end, and metallic devices having portions vvith the path of the slag as it fills the pockets and crane-engaging portions out of the path of the slag, the said devices comprising flattened endless links, arranged lengthwise of the pockets.

10. A plurality of slag-pockets arranged end to end, and metallic vdevices having portionswithin the path of the slag" as it fills the poel-iets and crane-engaging portions out of the path of the slag, the said devices j comprising a pair of fiattened interlinked links for each pocket, one arranged lengthwise of the pocket and the other transversely thereof.

11. A plurality of slag-pockets arranged end to end, metallic devices having portions within the path of the slag as it fills the pockets and crane-engaging portions out of the path of the slag, and a metal anchor for anchoring the said devices in slag in the pockets.

12. In a slag-pocket, fixed side walls, a plurality of subpockets arranged end to end between the side walls and a readily displaceable ller between the side walls and the subpockets and also between the ends of successive subpockets.

13. In a. slag-pocket, fixed side walls, a plurality of subpockets arranged end to end between the side walls, and a readily displaceable filler between the side walls and the subpockets, the said filler containing a carbonaceous material convertible into charcoal by the heat of the furnace gases and the slag.

14. In a slag-pocket, fixed side walls, a plurality of subpockets arranged end to end between the side walls, and a readily displaceable filler between the side walls and the subpockets, the said filler containing a mixture of refractory bodies and acarbonaceous materlal convertible into charcoal.

rary walls.

17. In a slag-pocket, fixed side walls, a plurality of subpockets within the same, having temporary side walls and separated by temporary partitions, and readily remov able filler between the adjacent fixed and temporary side walls.

18. In a slag-pocket, fixed side walls, a plurality of subpockets within the same, having temporary side walls and separated by temporary partitions, and readily removable filler between the adjacent fixed and temporary side walls and also in the parttions.

Signed at Pittsburgh, Pa., this 13th day of March, A. D. 1916.

ERNEST H. HOLZWORTH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

